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प्रश्न
Classify the following as physical or chemical changes :
- Cooking of food
- Boiling of water
- Cutting of trees
- D0issolving salt in water
- Digestion of food
- Melting of ice
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उत्तर
- Cooking of food – Chemical change
- Boiling of water – Physical change
- Cutting of trees – Physical change
- Dissolving salt in water – Physical change
- Digestion of food – Chemical change
- Melting of ice- Physical change
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संबंधित प्रश्न
Melting of solid (wax) is a physical change.
Write short answer.
Give an example of desirable change which can also be undesirable
A physical change is temporary. Explain.
State whether the following is physical or chemical changes.
Slaking of lime —
Fill in the blank
Changes that occur in nature are called ______
Classify the following as a physical or a chemical change.
Drying of wet clothes
Classify the following as a physical or a chemical change.
Butter getting rancid
Fill in the blank.
The reaction in which energy is evolved is called
State why addition of sodium chloride to water is considered a physical change, while addition of dilute sulphuric acid to zinc is considered a chemical change.
Fill in the blank with the correct word of the statement given below:
Sublimation involves a __________ change.
